A&A 455, 339-348 (2006)
Observations of a soft X-ray rising loop associated with a type II burst and a coronal mass ejection in the 03 November 2003 X-ray flareC. Dauphin1, N. Vilmer1 and S. Krucker2
1 LESIA, Observatoire de Paris, 92195 Meudon Cedex, France
2 Space Sciences Laboratory, University of California, Berkeley, CA-94720, USA
(Received 17 November 2005 / Accepted 13 April 2006 )
Context.We report observations of a type II burst - the signature of a shock wave - starting at the unusual high frequency of 650 MHz during the 03 November 2003 flare. This flare is associated with the propagation of a soft X-ray coronal loop and with a coronal mass ejection (CME).
Aims.We study in this paper the origin of the shock wave in the low corona and present a kinematics analysis of the soft X-ray coronal loop and of the CME observed a few tens of minutes later.
Methods.We study in this paper the spatial and temporal relation between the soft X-ray rising loop observed by the GOES soft X-ray Imager (GOES/SXI), the type II sources observed by the Nançay Radio Heliograph (NRH) and the CME observed by LASCO (Large Angle and Spectroscopic Coronograph).
Results.This analysis shows that the type II burst observed during this flare is driven by the X-ray rising loop. Furthermore, the kinematics analysis of the X-ray coronal loop and CME shows that the two structures are related.
Conclusions.The direct comparison of the type II sources with the GOES/SXI observations clearly shows that the type II burst is ignited by the shock wave created ahead of the rising X-ray loop. Finally, we propose to interpret these different observations in the framework of an ascending magnetic structure with a reconnecting process operating in the tail of this ascending structure.
Key words: Sun: flares -- Sun: radio radiation -- Sun: coronal mass ejections (CMEs)
© ESO 2006